The ventilation system on the WhisperKOOL Extreme Series is ideal for ducting. The optional duct collars fit standard 8" ventilation ducting, allowing the installer to vent air to and from the unit for optimum performance. Use ductwork to connect the unit to the supply and return outlets in the wine cellar. Use only insulated ductwork to minimize cooling losses, prevent sweating, and reduce noise. Use ductwork on the condenser section to redirect or absorb sound, bring in outside air to the unit inlet, and/or exhaust the hot air out of the ambient space.